Electrostatic part 16//restoring torque // Electric Charge and Field// By Er. Mahendra Nagar

Electric charges and fields

Electric charges and fields

Electric charges and fields

Electric charges and fields

Electric charges and fields

Electric charges and fields

Answer the following: State Gauss' law in electrostatics. Derive an expression for the electric field due to an infinitely long straight uniformly charged wire.

State Gauss's theorem in electrostatics. Apply this theorem to derive an expression for electric field intensity at a point outside a uniformly charged thin spherical shell.

A metal sphere of radius R is charged to a pontital V . (a ) Find the electrostatic energy stored in the electric field within a concentric sphere of radius 2 R . (b )Show that the electrostatic field energy stored outside the sphere of radius 2R equals that stored within it .

Assertion : Electrostatic field lines start at positive charges and end at negative charges. Reason : Field lines are continuous curves without any breaks and they form closed loop.